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Seminars

24.02.2010. :: Seminar Fizickog fakulteta

 


A quest for Pfaffian

Dr Milica Milovanovic
Institut za fiziku u Beogradu


Abstract:

The observed fractional quantum Hall effect at even denominator filling factor 5/2 is widely believed to be connected with Moore-Read Pfaffian state. This state represents a unique phase of matter, a non-Abelian topological phase, with possible applications to quantum topological computing. The Pfaffian state can be viewed as a p-wave superconductor of dressed electrons, so-called composite fermions. There is an interesting mathematical identity relating two-component Abelian 331 state and Pfaffian. We will try to induce this connection by tunneling mechanism, in order to transform two-component 331 state into one-component Pfaffian. We present a theory of this transition based on the p-wave fermion
description and compare to numerical results.



Seminar ce se odrzati u sredu 24. februara 2010. godine u 13:00 casova u fizickom amfiteatru (sala 661), III sprat.
Institute of Physics Belgrade - Pregrevica 118 - 11080 Belgrade - Serbia, Switchboard: +381 11 3713000, Fax: +381 11 3162190